effervescence vs weakness

effervescence

noun
  • Vivacity. 

  • The escape of gas from solution in a liquid, especially the escape of carbon dioxide from a carbonated drink. 

  • Foment. 

weakness

noun
  • An inadequate quality; fault 

  • The condition of being weak. 

  • A special fondness or desire. 

How often have the words effervescence and weakness occurred in a corpus of books? (source: Google Ngram Viewer )